Work

Investigations of the weak decays of D B ¯ molecules

Year: 2024

Type: article

Abstract: The decays of exotic states discovered experimentally always proceed via the strong and electromagnetic interactions. Recently, a tetraquark state with the quark content b c q ¯ q ¯ was predicted by lattice QCD simulations. It is below the mass threshold of D B ¯ , which can only decay via the weak interaction. In this work, based on the decay mechanism of T c c as a D D * molecule, we propose that the decays of the b c q ¯ q ¯ tertaquark state as a D B ¯ molecule proceed via the Cabibbo-favored weak decays of the B ¯ or D meson, accompanied by the tree-level decay modes and the triangle decay modes. Our results indicate that the branching fraction of the D B ¯ molecule decaying into π + K − B ¯ 0 is sizable, which is a good channel to observe the D B ¯ molecule in future experiments. Published by the American Physical Society 2024

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.053002

Authors: Ming-Zhu Liu, Li-Sheng Geng

Institutions: Lanzhou University, Chinese Academy of Sciences, Beihang University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: 从产生机制研究奇特强子态, G2188395147